<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2022v5.0" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-07-22T12:48:28-07:00</ReturnTs>
    <TaxPeriodEndDt>2023-11-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>830651827</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Natalie Group</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>2025 Gateway Place 110</AddressLine1Txt>
        <CityNm>San Jose</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>95110</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2022-12-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>874083970</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>PROBABILISTIC BASKETBALL</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>CHESS FOUNDATION</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>PROB</BusinessNameControlTxt>
      <PhoneNum>4086671001</PhoneNum>
      <USAddress>
        <AddressLine1Txt>470 Ruthven Ave</AddressLine1Txt>
        <CityNm>Palo Alto</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>94301</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>XIAO-QIANG WU</PersonNm>
      <PersonTitleTxt>CEO</PersonTitleTxt>
      <SignatureDt>2024-07-22</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>XIAO-QIANG</PersonFirstNm>
        <PersonLastNm>WU</PersonLastNm>
      </PersonFullName>
      <SSN>999009999</SSN>
    </SigningOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>WEI QIU</PreparerPersonNm>
      <PTIN>P01592990</PTIN>
      <PhoneNum>4086276289</PhoneNum>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
        <FederatedAssuranceLevelCd>FAL1</FederatedAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2022</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="5">
    <IRS990PF documentId="IRS990PF" referenceDocumentId="GeneralExplanation" softwareId="22015553" softwareVersionNum="2022v5.0">
      <AddressChangeInd>X</AddressChangeInd>
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <FMVAssetsEOYAmt>27437</FMVAssetsEOYAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AnalysisOfRevenueAndExpenses>
        <ContriRcvdRevAndExpnssAmt>25000</ContriRcvdRevAndExpnssAmt>
        <TotalRevAndExpnssAmt>25000</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>0</TotalNetInvstIncmAmt>
        <CompOfcrDirTrstRevAndExpnssAmt>20000</CompOfcrDirTrstRevAndExpnssAmt>
        <CompOfcrDirTrstDsbrsChrtblAmt>20000</CompOfcrDirTrstDsbrsChrtblAmt>
        <OtherProfFeesRevAndExpnssAmt referenceDocumentId="OtherProfessionalFeesSchedule">985</OtherProfFeesRevAndExpnssAmt>
        <OtherProfFeesDsbrsChrtblAmt>985</OtherProfFeesDsbrsChrtblAmt>
        <OtherExpensesRevAndExpnssAmt referenceDocumentId="OtherExpensesSchedule AmortizationSchedule">5025</OtherExpensesRevAndExpnssAmt>
        <OtherExpensesDsbrsChrtblAmt>5025</OtherExpensesDsbrsChrtblAmt>
        <TotOprExpensesRevAndExpnssAmt>26010</TotOprExpensesRevAndExpnssAmt>
        <TotOprExpensesNetInvstIncmAmt>0</TotOprExpensesNetInvstIncmAmt>
        <TotOprExpensesDsbrsChrtblAmt>26010</TotOprExpensesDsbrsChrtblAmt>
        <ContriPaidRevAndExpnssAmt>0</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>0</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>26010</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>0</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>26010</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>-1010</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
        <CashBOYAmt>2462</CashBOYAmt>
        <CashEOYAmt>27437</CashEOYAmt>
        <CashEOYFMVAmt>27437</CashEOYFMVAmt>
        <TotalAssetsBOYAmt>2462</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>27437</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>27437</TotalAssetsEOYFMVAmt>
        <AccountsPayableEOYAmt>25985</AccountsPayableEOYAmt>
        <TotalLiabilitiesEOYAmt>25985</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
        <CapitalStockBOYAmt>20025</CapitalStockBOYAmt>
        <CapitalStockEOYAmt>45025</CapitalStockEOYAmt>
        <RetainedEarningBOYAmt>-17563</RetainedEarningBOYAmt>
        <RetainedEarningEOYAmt>-43573</RetainedEarningEOYAmt>
        <TotNetAstOrFundBalancesBOYAmt>2462</TotNetAstOrFundBalancesBOYAmt>
        <TotNetAstOrFundBalancesEOYAmt>1452</TotNetAstOrFundBalancesEOYAmt>
        <TotalLiabilitiesNetAstBOYAmt>2462</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>27437</TotalLiabilitiesNetAstEOYAmt>
      </Form990PFBalanceSheetsGrp>
      <ChgInNetAssetsFundBalancesGrp>
        <TotNetAstOrFundBalancesBOYAmt>2462</TotNetAstOrFundBalancesBOYAmt>
        <ExcessRevenueOverExpensesAmt>-1010</ExcessRevenueOverExpensesAmt>
        <SubtotalAmt>1452</SubtotalAmt>
        <TotNetAstOrFundBalancesEOYAmt>1452</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <ExciseTaxBasedOnInvstIncmGrp>
        <InvestmentIncomeExciseTaxAmt>0</InvestmentIncomeExciseTaxAmt>
        <AppliedToESTaxAmt>0</AppliedToESTaxAmt>
      </ExciseTaxBasedOnInvstIncmGrp>
      <StatementsRegardingActyGrp>
        <LegislativePoliticalActyInd>false</LegislativePoliticalActyInd>
        <MoreThan100SpentInd>false</MoreThan100SpentInd>
        <Form1120POLFiledInd>false</Form1120POLFiledInd>
        <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
        <ChangesToArticlesOrBylawsInd>false</ChangesToArticlesOrBylawsInd>
        <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
        <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
        <Section508eRqrSatisfiedInd>true</Section508eRqrSatisfiedInd>
        <AtLeast5000InAssetsInd>true</AtLeast5000InAssetsInd>
        <OrgReportOrRegisterStateCd>CA</OrgReportOrRegisterStateCd>
        <Form990PFFiledWithAttyGenInd>true</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>true</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd referenceDocumentId="SubstantialContributorsSchedul">true</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>false</OwnControlledEntityInd>
        <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
        <PersonsWithBooksName>
          <BusinessNameLine1Txt>XIAO-QIANG WU</BusinessNameLine1Txt>
        </PersonsWithBooksName>
        <PhoneNum>4086671001</PhoneNum>
        <LocationOfBooksUSAddress>
          <AddressLine1Txt>470 Ruthven Ave</AddressLine1Txt>
          <CityNm>Palo Alto</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94301</ZIPCd>
        </LocationOfBooksUSAddress>
        <ForeignAccountsQuestionInd>false</ForeignAccountsQuestionInd>
      </StatementsRegardingActyGrp>
      <StatementsRegardingActy4720Grp>
        <SaleOrExchDisqualifiedPrsnInd>false</SaleOrExchDisqualifiedPrsnInd>
        <BrrwOrLendDisqualifiedPrsnInd>false</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>false</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>false</PayCompDisqualifiedPrsnInd>
        <TransferAstDisqualifiedPrsnInd>false</TransferAstDisqualifiedPrsnInd>
        <PaymentToGovernmentOfficialInd>false</PaymentToGovernmentOfficialInd>
        <ActsFailToQlfyAsExceptionsInd>false</ActsFailToQlfyAsExceptionsInd>
        <UncorrectedPriorActsInd>false</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>false</UndistributedIncomePYInd>
        <BusinessHoldingsInd>false</BusinessHoldingsInd>
        <JeopardyInvestmentsInd>false</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>false</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>false</InfluenceLegislationInd>
        <InfluenceElectionInd>false</InfluenceElectionInd>
        <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>false</GrantsToOrganizationsInd>
        <NoncharitablePurposeInd>false</NoncharitablePurposeInd>
        <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
        <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
        <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
        <SubjToTaxRmnrtnExPrchtPymtInd>false</SubjToTaxRmnrtnExPrchtPymtInd>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>XIAO-QIANG WU</PersonNm>
          <USAddress>
            <AddressLine1Txt>470 Ruthven Ave</AddressLine1Txt>
            <CityNm>Palo Alto</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94301</ZIPCd>
          </USAddress>
          <TitleTxt>CEO</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>8.00</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>ALICE YUEHONG WANG</PersonNm>
          <USAddress>
            <AddressLine1Txt>470 Ruthven Ave</AddressLine1Txt>
            <CityNm>Palo Alto</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94301</ZIPCd>
          </USAddress>
          <TitleTxt>CFO</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>8.00</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>20000</CompensationAmt>
        </OfficerDirTrstKeyEmplGrp>
        <CompOfHghstPdEmplOrNONETxt>NONE</CompOfHghstPdEmplOrNONETxt>
        <CompOfHghstPdCntrctOrNONETxt>NONE</CompOfHghstPdCntrctOrNONETxt>
      </OfficerDirTrstKeyEmplInfoGrp>
      <SummaryOfDirectChrtblActyGrp>
        <Description1Txt>From April to September 2023, four basketball chess promotions and competitions. We organized regular promotion and activities of basketball and chess to enrich people's leisure life, promote healthy minds, and promote intellectual development. Specifically, activities include but not limited to the following:Date: 12/01/2022 03/19/2023Contacting manufacturing vendors for PBC game pieces, board, and packaging. Selected 2 vendors of chess pieces of different materials, one with Plexiglas, one with rubber. Brought samples and used in PBC promotion activities.Date: 04/03/2023 08/17/2023Activities: PBC Training and entertainment, playing the Probabilistic Basketball Chess game using the Combinational Remainder Methods and Repeated Random Game Theory in Northern California. Specifically connected with sports club members at the Swan Ping Pong Club (located at 2600 Lafayette St, Santa Clara, CA 95050) to promote PBC, held frequent activities at the club and also at the homes of the club memb</Description1Txt>
        <Expenses1Amt>0</Expenses1Amt>
        <Description2Txt>We regularly organize activities, including outings, art lectures, horticultural exchanges, and culinary exchange. On December 29, 2022, an art appreciation salon was organized in the Bay Area</Description2Txt>
        <Description3Txt>From April to August 2023, 5 culinary exchange and food promotion activities were organized.</Description3Txt>
      </SummaryOfDirectChrtblActyGrp>
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>0</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>3501</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>0</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>3501</TotalFMVOfUnusedAssetsAmt>
        <ReductionClaimedAmt>0</ReductionClaimedAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>3501</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>53</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>3448</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>172</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <Sect4942j3j5FndtnAndFrgnOrgInd>X</Sect4942j3j5FndtnAndFrgnOrgInd>
      </DistributableAmountGrp>
      <PFQualifyingDistributionsGrp>
        <ExpensesAndContributionsAmt>26010</ExpensesAndContributionsAmt>
        <QualifyingDistributionsAmt>26010</QualifyingDistributionsAmt>
      </PFQualifyingDistributionsGrp>
      <PrivateOperatingFoundationsGrp>
        <PrivateOperatingFndtnRulingDt>2022-05-11</PrivateOperatingFndtnRulingDt>
        <Section4942j3Ind>X</Section4942j3Ind>
        <LessorAdjNetIncmMinInvstRetGrp>
          <CurrentYearAmt>0</CurrentYearAmt>
          <TotalAmt>0</TotalAmt>
        </LessorAdjNetIncmMinInvstRetGrp>
        <QualifyingDistributionsGrp>
          <CurrentYearAmt>26010</CurrentYearAmt>
          <Year1Amt>17563</Year1Amt>
          <TotalAmt>43573</TotalAmt>
        </QualifyingDistributionsGrp>
        <QualifyingDistriMadeDrtGrp>
          <CurrentYearAmt>26010</CurrentYearAmt>
          <Year1Amt>17563</Year1Amt>
          <TotalAmt>43573</TotalAmt>
        </QualifyingDistriMadeDrtGrp>
        <TwoThirdsMinimumInvstRetGrp>
          <CurrentYearAmt>115</CurrentYearAmt>
          <Year1Amt>280</Year1Amt>
          <TotalAmt>395</TotalAmt>
        </TwoThirdsMinimumInvstRetGrp>
      </PrivateOperatingFoundationsGrp>
      <SupplementaryInformationGrp>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
      </SupplementaryInformationGrp>
      <TrnsfrTransRlnNonchrtblEOGrp>
        <TrnsfrOfCashToNonchrtblEOInd>false</TrnsfrOfCashToNonchrtblEOInd>
        <TrnsfrOtherAssetNonchrtblEOInd>false</TrnsfrOtherAssetNonchrtblEOInd>
        <SalesOrExchangesOfAssetsInd>false</SalesOrExchangesOfAssetsInd>
        <PurchaseOfAssetsNonchrtblEOInd>false</PurchaseOfAssetsNonchrtblEOInd>
        <RentalOfFacilitiesOthAssetsInd>false</RentalOfFacilitiesOthAssetsInd>
        <ReimbursementArrangementsInd>false</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>false</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>false</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>false</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>false</RelationshipsNonchrtblEOInd>
      </TrnsfrTransRlnNonchrtblEOGrp>
    </IRS990PF>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="22015553" softwareVersionNum="2022v5.0">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <GeneralRuleInd>X</GeneralRuleInd>
      <ContributorInformationGrp>
        <ContributorNum>1</ContributorNum>
        <ContributorPersonNm>PATRICK WU</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>5657 MORNINGSIDE DR</AddressLine1Txt>
          <CityNm>SAN JOSE</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>95138</ZIPCd>
        </ContributorUSAddress>
        <TotalContributionsAmt>25000</TotalContributionsAmt>
        <PersonContributionInd>X</PersonContributionInd>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <OtherExpensesSchedule documentId="OtherExpensesSchedule" softwareId="22015553" softwareVersionNum="2022v5.0">
      <OtherExpensesScheduleGrp>
        <Desc>ATTORNEY FILING FEE</Desc>
        <RevenueAndExpensesPerBooksAmt>25</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>25</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>VARIOUS ACTIVITIES COSTS</Desc>
        <RevenueAndExpensesPerBooksAmt>5000</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>5000</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherProfessionalFeesSchedule documentId="OtherProfessionalFeesSchedule" softwareId="22015553" softwareVersionNum="2022v5.0">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>TAX RETURN FILING</CategoryTxt>
        <Amt>985</Amt>
        <NetInvestmentIncomeAmt>0</NetInvestmentIncomeAmt>
        <AdjustedNetIncomeAmt>0</AdjustedNetIncomeAmt>
        <DisbursementsCharitablePrpsAmt>985</DisbursementsCharitablePrpsAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <SubstantialContributorsSch documentId="SubstantialContributorsSchedul" softwareId="22015553" softwareVersionNum="2022v5.0">
      <SubstantialContributorDetail>
        <PersonNm>PATRICK WU</PersonNm>
        <USAddress>
          <AddressLine1Txt>5657 MORNINGSIDE DR</AddressLine1Txt>
          <CityNm>SAN JOSE</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>95138</ZIPCd>
        </USAddress>
      </SubstantialContributorDetail>
    </SubstantialContributorsSch>
  </ReturnData>
</Return>
